Programmatically assign transformers to properties

[jorr-it]

Is it possible to programmatically configure custom transformations (like in callbacks) for specific properties or can this only be in attributes?

For example, with .NET's AutoMapper:

var configuration = new MapperConfiguration(cfg =>
  cfg.CreateMap<Source, Destination>()
	.ForMember(dest => dest.SomeValuefff)
);

or in a competing PHP AutoMapper:

$config = new AutoMapperConfig();
$config
    ->registerMapping(Employee::class, EmployeeDto::class)
    ->forMember('age', function (Employee $source) {
        return date('Y') - $source->getBirthYear();
    });

I didn't find anything about this in your documentation. It could be useful when we want to dynamically define the mappings.

[joelwurtz]

We did have this at the start (but was removed when we switch to using attribute)

This could be done if we allow to configure our mapper directly with php (like the second suggestion) instead of attribute, (basically this is just a transformer). Not really planned at the moment, but if someone wants to give a try we are open to it.